Play a trill that starts slow, accelerates, and ends with a turn.
Apply variable-speed trills convincingly at multiple cadences in a single piece.
A good trill has a shape. A bad trill is a constant.
A good Baroque trill starts slower than its final speed, accelerates through its course, and ends with a turn that prepares the next note. The trill has a shape, the same way a phrase has a shape.
Accelerating trill
Start with deliberate alternation, then accelerate. The transition should be smooth, not stepped.
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Trill termination — the turn
A trill that ends on its main note sounds incomplete. The Baroque convention is a turn (the note below, then back) before resolving.
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Variable speed across a piece
Cadences in one piece should not all have identical trills. Make the first slower and shorter, the final longer and faster.
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